This tutorial was written with CorelX19 and translated with CorelX17, but it can also be made using other versions of PSP.
Since version PSP X4, Image>Mirror was replaced with Image>Flip Horizontal,
and Image>Flip with Image>Flip Vertical, there are some variables.
In versions X5 and X6, the functions have been improved by making available the Objects menu.
In the latest version X7 command Image>Mirror and Image>Flip returned, but with new differences.
See my schedule here

For this tutorial, you will need:
Tubes of yours.
The rest of the material here
Thanks for the material
Main tube (not supplied) is by Mtfp (mtfp_516_Alice).
The image used for the misted found in Internet.
The rest of the material is by Yedralina
(The links of the tubemakers here).

2. Effects>Plugins>Mehdi - Wavy Lab 1.1
This filters creates gradients with the colors of your palette.
The first is your background color, the second is your foreground color.
Keep the last two colors created by the filter.

The preset, created with Corel19, works also with the previous versions.
However, if you have problems, you can do this:
Pull the lateral nodes 1, 2 and 3 down
(to show you the nodes, I made it before the Lek plugin)

Begin with the left nodes

and you'll get this

Repeat with the right nodes

*****

M Key to deselect the Tool.

5. Effects>Reflection Effects>Rotating Mirror.

6. Layers>New Raster Layer.

Selections>Load/Save Selection>Load Selection from Alpha Channel.
The selection #1 is immediately available. You just have to click Load.

7. Selections>Modify>Inside/Outside Feather.

Flood Fill the selection with your gradient.

8. Selections>Modify>Inside/Outside Feather, same settings.

9. Open your landscape misted and go to Edit>Copy.
Go back to your work and go to Edit>Paste into Selection.
Selections>Select None.

10. Effects>Reflection Effects>Rotating Mirror.

Reduce the opacity of this layer to 80%.

11. Layers>New Raster Layer.

Selections>Load/Save Selection>Load Selection from Alpha Channel.
Open the selection menu and load the selection #2.

12. Effects>Plugins>Mehdi - Wavy Lab 1.1., same settings.

13. Layers>New Raster Layer.

Selections>Load/Save Selection>Load Selection from Alpha Channel.
Open the selection menu and load the selection #3.

Flood Fill the selection with your gradient.

14. Edit>Paste into Selection (the misted is always in memory).of course, you can use a different tube;
for my example I used the same image, but processed with different masks

15. Layers>New Raster Layer.

Effects>3D Effects>Cutout.

Selections>Select None.

16. Layers>Merge>Merge Down - 2 times.

17. Objects>Align>Top
If you are working with a previous version that has not available the Objects menu,
use the Move Tool

18. Effects>3D Effects>Drop Shadow, color black.

19. Activate the bottom layer.
Layers>Duplicate.
Image>Flip.

20. Effects>Geometric Effects>Perspective vertical.

21. Selections>Load/Save Selection>Load Selection from Alpha Channel.
Open the selection menu and load the selection #4.

Press CANC on the kayboard

Image>Flip.

22. K key on the keyboard to activate the Pick Tool
mode Scale
pull the top central node

down until 540 pixels.

M Key to deselect the Tool.

23. Activate the top layer.

Open your main tube and go to Edit>Copy.
Go back to your work and go to Edit>Paste as new layer.
Image>Resize, if it is necessary, resize all layers not checked.
Place the tube where your like.